WIP test all node.js unpipe

package.json

@@ -28,7 +28,8 @@
     "eslint-plugin-standard": "4.0.0",
     "istanbul": "0.4.5",
     "mocha": "6.0.2",
-    "supertest": "4.0.0"
+    "supertest": "4.0.0",
+    "unpipe": "1.0.0"
   },
   "files": [
     "LICENSE",

test/compression.js

@@ -5,6 +5,7 @@ var bytes = require('bytes')
 var crypto = require('crypto')
 var http = require('http')
 var request = require('supertest')
+var unpipe = require('unpipe')
 var zlib = require('zlib')
 
 var compression = require('..')
@@ -456,12 +457,6 @@ describe('compression()', function () {
   })
 
   it('should not leak event listeners when res.unpipe() is used (#135)', function (done) {
-    // unpipe and stream.Readable were added in v0.9.4
-    var stream = require('stream')
-    if (!(stream.Readable && stream.Readable.prototype.unpipe)) {
-      this.skip()
-    }
-
     var hasWarned = false
     var onWarning = function () {
       hasWarned = true
@@ -471,7 +466,7 @@ describe('compression()', function () {
       var int = setInterval(function () {
         var rs = require('fs').createReadStream('does not exist')
         rs.on('error', function (e) {
-          rs.unpipe(res)
+          unpipe(rs)
         })
         rs.pipe(res)
         if (times++ > res.getMaxListeners()) {